Antisiphoning spray tube



Sept. 4, 1951 c. A. TEA ETAL ANTIsIPHoNxNG SPRAY TUBE:

2 Sheet's-Sheet 1 Filed Feb. 27. 1946 @al FSc/ Sept- 4, 1951 c. A. TEA ETAL ANTISIPHONING SPRAY TUBE 2 Sheets-Sheet 2 Filed Feb. 27, 1946 Patented Sept. 4, 1951 AN'rrsIPHoNINo SPRAY TUBE Clark A. Tea, Detroit, and Paul F. Aschman, Highland Park, Mich., assignors to The Murray Corporation of America, Detroit, Mich., a corporation oi Delaware Application February Z7, 1946, Serial No. 650,575

(Cl. IS7-21) 3 Claims.

rllhis invention relates to antisiphoning devices, and particularly to an antisiphoning spray tube to be employed on washing machines and like devices which are to be iilled from the exterior thereof.

Certain regulations have been passed in various states requiring antisiphoning devices to be employed on washing machines and like appliances to prevent the water therein from being siphoned into the supply conduit of a building. It was found that when water is drawn in such quantities in one portion of the building, a siphoning effect is produced in the conduit in another portion thereof. If the conduit is directly connected tc wash tubs, sumps and the like, the water therein will be siphoned into the conduit and danger to the users of Water from the conduit might result therefrom.

The device of the present invention prevents the siphoning of the water from a tub, sump and the like while freely admitting the water thereto under pressure. Ihe device embodies a tube of small diameter from which the water is directed into a tube of larger diameter spaced therefrom. The water is introduced at such pressure as to force the water out of the end of the tube with a substantial pressure so that the water may be sprayed over the rotor of a washing machine or the surface of a tub, sump, and the like. Preferably, the tube of larger diameter is of U- shape to form a trap which will prevent suds,

foam, and the like on the water from working upwardly from the tube into contact with the spaced tube of smaller diameter. No contact whatsoever can occur between the substance in the tub with the smaller tube. This provides assurance that in case a suction should be applied to the smaller tube, none of the contents of the washing machine, tub, sump, and the like could be drawn into the tube and in the water conducting system.

Accordingly, the main objects of the invention are: to provide an antisiphoning device having .a space in the conduction portion thereof which eliminates any chance of communication between the conducting and receiving portion oi the device; to provide an antisiphoning device with a small delivery tube which is spaced a substantial distance from a larger receiving tube to prevent the reversal of now of the liquid in the larger receiving tube when a suction is applied to the small delivery tube; to provide an antisiphoning device with a small delivery tube spaced from a larger delivery tube which is of U-shape. to form a trap for the liquid which prevents suds, foam, and the like from rising out of the open end of the tube into contact with the spaced delivery tube when a suction is applied thereto; and, in general, to provide an antisiphoning device which is simple in construction, positive in operation and economical of manufacture.

Other objects and features of novelty of the invention will be specifically pointed out or will become apparent when referring for a better understanding of the invention, to the following description taken in conjunction with the accompanying drawings, wherein:

Figure l is a broken view in elevation of a washing machine having an antisiphoning device thereon embodying features of this invention;

Fig. 2 is a sectional view of the structure illustrated in Fig. l, taken on the line 2-2 thereof;

Fig. 3 is a sectional view of the structure illustrated in Fig. l, taken on the line 3-3 thereof;

Fig. fi is a sectional view of the structure illustrated in Fig. l, taken on the line 4-4 thereof, and

Fig. 5 is a sectional View of the structure illustrated in Fig. 4, taken on the line 5--5 thereof.

The antisiphoning device of the present invention is herein illustrated as being applied to a washing machine of conventional form. It is to be understood, however, that the antisiphoning device is not limited to the particular application herein illustrated, but that the device may be employed in combination with any receptacle for receiving a liquid.

The machine herein illustrated embodies a tub I, having an end wall 2 removably secured thereto in which a rotor 3, containing the fabrics to be Washed, is driven in rotation. An aperture i is provided in the removable end wall E containing a sealing grominet 5 disposed about a tube Fi which extends within the tub and provided with an upwardly projecting end 'l having an opening. The upwardly projecting portion li ci the tube 6 is supported on the exterior oi the cover 5i a bracket 9 containing a semicylindrical clamping ring portion I 6. A plate II is secured to the bracket 9 by a pair of bolts l2, which bracket has a semicylindrical clamping ring portion I 3 which cooperates with the ring portion Iii to engage the upwardly extending portion t` of the tube 6 and iirmly secure it in position. The top open end of the upwardly extending portion 8 is anged outwardly at I4 to form a funnel on the end thereof.

The upper end of the bracket 9 and the plate II contain semicylindrical clamping ring portions I5 and I6 which engage a delivery tube Il v 3 of smaller diameter than the tube 6. The axis of the deliveryportion of the tube I1 is disposed in alignment with the axis of the upwardly extending portion 8 of the tube 6. A ring I8 may be secured tothe tube I1 in xed relation thereto for gaging the spacing of the end of the tube I1 from the funnel end I4 of the tube 6. The upper end of the tube I1 is reversely bent and provided with a sleeve I9 to which a flexible hose is attached for conducting the water from a source to the antisiphoning device. I

It will be noted from Figs. 1 and 4, that the tube 6 is of U-shape, having the inner, upwardly extending portion 1 and the outer, upwardly extending portion 8 to form a trap for the water or other fluid delivered by the device. The liquid in the trap prevents suds, foam, andthe like from rising upwardly and out the end of the portion 8 of the tube and provides assurance that nothing in the tube 6 can contact the tube I1. The pressure of the flow of water or other liquid delivered from the end of the tube I1 is directed into the funnel end I4 of the tube 6 and is carried through the tube out of the opening 20 in the end thereof, toward the peripheral wall of the rotor 3. The end of the tube portion 1 is flattened at 2l near the end, and the end portion i 22 of one wall flanged over the opening atan angle, while the portion in the wall adjacent to the tub is cut away at 23. The water from the openings 20 and 23 is directed onto the surface of the rotor in a manner to have it expand laterally thereacross. The rotor is driven counterclockwise, as viewed in Figure 1, and the water is directed onto the rotor in the direction of its rotation to assist in the spraying and expanding action of the water.

It was found in practice that the water deliv-l ered from the end of the tube I1 is directed into the upwardly extended portion 8 of the tube 6 without splashing over the edges thereof. After the delivery of the water into the tub, no contact of the water, suds, foam, and the like within the tub can be made with the end of the tube I1 so that if conditions are such as to produce a suction on the end of the tube I1, none of the contentsof the tub can beA drawn into the tube. As pointed out hereinabove, the antisiphoning device is not limited in application to a washing machine as illustrated, but may be applied to any device for holding a liquid.

What is claimed is:

1. An antisiphoning device for a washing machine comprising a spray tube Yof U-shape having one end projecting upwardly on the outside of the machine and a shorter inner end extending upwardly on the inner side thereof, a delivery tube of smaller diameter than said f spray tube, a bracket securable to said machine having a removable part, the bracket and the removable part having spaced pairs of semicylindrical ring portions, one pair of which engages and secures the outer end of said spray tube, the other pair of which engages and secures said delivery tube in spaced axially aligned relation with the outer end of said spray tube whereby fluid delivered from the delivery tube will be' directed into the spray tube and out the inner end thereof while forming a trap in the spray tube for preventing foam, suds, and the like in the machine from entering said delivery tube.

2. An antisiphoning device for a washing machine comprising a spray tube of U-shape having one end projecting upwardly on the outside of the machine and a shorter inner end extending upwardly on the inner side thereof, a delivery tube of smaller diameter than said spray tube, a bracket securable to said machine having a removable part, the bracket and the removable parthaving spaced pairs of semicylindrical ring portions, one pair Vof which engages and secures the outer end of Vsaid spray tube, the other pair of which engages and secures said delivery tube in spaced axially aligned relation with the outer end of said spray tube whereby fluid delivered' from the delivery tube will be directed into the spray tube and out the inner end thereof while forming a trap in the spray tube for Vpreventing V foam, suds, and the like in the machine from entering said delivery tube, said upwardly disposed end of the spray tube being enlarged to form a funnel.

3. A fluid control device for delivering water to a tub including, in combination, a spray tube of U-shape having a nozzle at one end adapted to stand upwardly within the tube and a Siphon end adapted to stand upwardly outside of said tub, said tube forming a trap at the bottom portion which is adapted to engage the tub, a delivery tube of smaller diameter than said spray tube, and means for mounting said delivery tube with its axis aligned with the axis of the Siphon portion of said spray tube and in spaced relation to said Siphon end whereby the force of the downward iiow of water intothe Siphon end of said spray tube will produce a spray of water within said tub from the spray tube nozzle beyond said trap.

CLARK A. TEA. PAUL F. ASCHMAN.

REFERENCES CTED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 242,871 Bradsh June 14, 1881 367,762 Murphy Aug. 2, 1887 417,351 Anderson Dec. 17, 1891 835,403 Coughlan Nov. 6, 1906 1,064,196 Cronk June 10, 1913 1,164,882 Sommer Dec. 2l, 1915 1,308,582 Cronk July 1, 1919 1,769,836 Y Holmes July 1, 1930 1,909,336 Castle May 16, 1933 1,965,379 Jewell July 3, 1934 2,198,416 Robertshaw Apr. 23, 1940 2,211,459 Dawson Aug. 13, 1940 2,250,974 Stoddard July 29, 1941 2,349,202 Y Slezak May 16, 1944 2,382,688 Wilson Aug. 14, 1945 2,417,908 Bowen Mar. 25, 1947 

